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EP1414620B1 - System with a tool holding fixture - Google Patents

System with a tool holding fixture Download PDF

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Publication number
EP1414620B1
EP1414620B1 EP02750812A EP02750812A EP1414620B1 EP 1414620 B1 EP1414620 B1 EP 1414620B1 EP 02750812 A EP02750812 A EP 02750812A EP 02750812 A EP02750812 A EP 02750812A EP 1414620 B1 EP1414620 B1 EP 1414620B1
Authority
EP
European Patent Office
Prior art keywords
application tool
tool
hub
holding fixture
sheet metal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP02750812A
Other languages
German (de)
French (fr)
Other versions
EP1414620A1 (en
Inventor
Harald Krondorfer
Markus Heckmann
Thomas Schomisch
Johann Huber
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tyrolit-Schleifmittelwerke Swarovski KG
Robert Bosch GmbH
Original Assignee
Tyrolit-Schleifmittelwerke Swarovski KG
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tyrolit-Schleifmittelwerke Swarovski KG, Robert Bosch GmbH filed Critical Tyrolit-Schleifmittelwerke Swarovski KG
Publication of EP1414620A1 publication Critical patent/EP1414620A1/en
Application granted granted Critical
Publication of EP1414620B1 publication Critical patent/EP1414620B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B45/00Means for securing grinding wheels on rotary arbors
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24DTOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D9/00Wheels or drums supporting in exchangeable arrangement a layer of flexible abrasive material, e.g. sandpaper
    • B24D9/08Circular back-plates for carrying flexible material
    • B24D9/085Devices for mounting sheets on a backing plate
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B45/00Means for securing grinding wheels on rotary arbors
    • B24B45/006Quick mount and release means for disc-like wheels, e.g. on power tools
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24DTOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D7/00Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
    • B24D7/16Bushings; Mountings
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T279/00Chucks or sockets
    • Y10T279/17Socket type

Definitions

  • the invention is based on a system with a tool holder according to the preamble of claim 1, such a device is known from DE 1 577 422.
  • a system with a tool holder which has a driving device, via which an insert tool with a drive shaft via a movable against a spring element mounted plug element is operatively connected.
  • the plug element fixes the insert tool positively in an operating position.
  • the grinding machine tool holder has a driver and a clamping nut. To mount the grinding wheel of the driver is pushed with a mounting hole on a collar of the drive shaft and clamped over the clamping nut frictionally against a bearing surface of the drive shaft.
  • the driver has a tool side in the axial direction extending collar radially on two opposite Has sides on its outer circumference recesses which extend in the axial direction to a bottom of the collar. Starting from the recesses extending against the drive direction of the drive shaft in each case a groove on the outer circumference of the collar. The grooves are closed against the drive direction of the drive shaft and taper axially from the recesses against the drive direction of the drive shaft.
  • the grinding wheel has a hub with a mounting opening in which two opposite, radially inwardly pointing tongues are arranged.
  • the tongues can be introduced into the recesses in the axial direction and then into the grooves in the circumferential direction, counter to the drive direction.
  • the grinding wheel is positively connected via the tongues in the grooves in the axial direction and frictionally fixed by the tapered contour of the grooves. During operation, the adhesion increases due to acting on the grinding wheel reaction forces acting counter to the drive direction.
  • a stopper is arranged in the region of a recess on the circumference of the collar and is movably mounted in an opening in the axial direction. In a working position pointing downwards with the grinding wheel, the stopper is deflected by gravity axially in the direction of the grinding wheel, closes the groove in the direction of the recess and blocks movement of the tongue located in the groove in the drive direction of the drive shaft.
  • the invention relates to a system with a tool holder, which has a driving device, via which an insert tool with a drive shaft is operatively connected, and with an insertion tool.
  • the insertion tool via at least one movable against a spring element locking element with the driving device is connected, which engages in an operating position of the insert tool and the insert tool fixed positively, at least at the tool holder at least a part of a means for avoiding a reversed mounting of the insert tool is mounted.
  • Damaging or destroying insert tools, in particular rotationally bound diamond cutting discs can advantageously be avoided and damage to the hand tool machine during normal operation by the reversed assembly can be prevented.
  • portable power tools whose insert tool with a quick-release system can be particularly quickly and easily mounted or replaced, it is particularly important that an insecure attachment of the insert tool caused by a wrong-side incorrect assembly is avoided.
  • the entrainment device has at least one functional element which forms at least part of the agent.
  • Existing components can be used advantageously and additional components for the realization of the agent can be avoided.
  • the means may be formed in various ways, for example, the means may be formed by a specially shaped clamping hook, which blocks a rotational movement required for complete assembly in a reversed mounting of the insert tool.
  • the coding can be formed by various components that appear appropriate to the person skilled in the art. However, the coding is particularly advantageously formed at least in part by a functional element, such as, for example, a tensioning hook or a detent element which secures the insertion tool in the circumferential direction.
  • the functional element in the direction of insertion tool has a projection surface which is asymmetrical to an axis perpendicularly intersecting a rotation axis of the insert tool, wherein the insert tool has one of the projection at least partially corresponding, corresponding to the functional element recess ,
  • the insert tool has a disc-shaped hub formed by a separate component. It can be achieved a hub that is inexpensive and easy to produce.
  • the hub can be made of a special material, in particular of a metal sheet, so that particularly simple and inexpensive, e.g. with a punching method, a corresponding with the functional element recess can be accurately introduced.
  • the hub may be formed of other materials which the person skilled in the art would consider useful, such as e.g. made of a plastic, a glass fiber, a composite, etc. and / or may also be integrally formed on the insert tool.
  • the insert tool has a hub with a shaping pointing in the axial direction. It can be easily and inexpensively achieved a protection of the functional elements and also can be advantageously avoided by the formation of a 'reversed mounting of the insert tool. If the hub formed by a sheet metal part, the formation can be inexpensively formed in a deep-drawing process.
  • the shaping can have various forms that appear appropriate to the person skilled in the art. If the hub is cup-shaped or extends in the middle region of the hub over a larger area, the molding can be formed with a simple tool and also a high stability of the hub can be achieved. Furthermore, in particular in handheld power tools that have a protective hood, a positive connection of the functional element with a Recess of the hub of the insert tool can be prevented in a side-inverted mounting, namely by the insert tool rests on the protective cover due to the formation in a reversed mounting before the functional element comes into engagement in the recess.
  • the solution according to the invention can be applied to various hand tool machines that appear suitable for the person skilled in the art, in particular for angle grinders.
  • Fig. 1 shows an angle grinder 44 from above with a mounted in a housing 46, not shown electric motor.
  • the angle grinding machine 44 can be guided via a first, in the housing 46 on the side facing away from a blade 12, extending in the longitudinal direction handle 48 and a second attached to a gear housing 50 in the region of the cutting disc 12, transversely to the longitudinal direction extending handle 52 feasible.
  • a drive shaft 14 can be driven via a transmission, not shown in detail, at whose end facing the blade 12 a tool holder with a driving device 10 is arranged (Fig. 2).
  • the tool holder and the cutting disc 12 form a system.
  • the entrainment device 10 has a driving flange 54, which forms a bearing surface 56 for the cutting disk 12 (FIGS. 2 and 4).
  • a collar 58 is integrally formed on the side facing the cutting disk 12, via which the cutting disk 12 is radially centered with its centering bore 88 in the mounted state. Radial forces can advantageously be absorbed by the driving flange 54 without loading an unlocking button 60.
  • a metal plate 62 On a side facing away from the cutting disc 12 of the driving flange 54 is a metal plate 62 with three circumferentially 36, 38 evenly distributed, integrally formed, extending in the axial direction 34 clamping hooks 24 for axial fixation of the cutting disc 12 is arranged (FIGS. 2 and 4).
  • the clamping hooks 24 are formed in a bending operation on the metal plate 62.
  • the driving flange 54, a corrugated spring 64 and the sheet metal plate 62 are pre-assembled.
  • the corrugated spring 64 is pushed onto a pointing in the direction away from the blade 12 direction collar 94 of the driving flange 54.
  • the clamping hooks 24 of the metal plate 62 which at its free end a hook-shaped extension with a circumferentially facing inclined surface 78 (FIGS. 2, 3 and 4), guided in the axial direction 34 by recesses 70 of the driving flange 54, respectively by widened regions 90 of the recesses 70 (FIGS. 2 and 4).
  • the wave spring 64 By compressing and rotating the metal plate 62 and the driving flange 54 against each other, the wave spring 64 is biased, and the metal plate 62 and the driving flange 54 are positively connected in the axial direction 34, 66, by the hook-shaped projections in narrow portions 68 of the recesses 70 is rotated ( Figures 2, 3 and 4).
  • the metal plate 62 is then, loaded by the wave spring 64, supported on the support surface 56 of the driving flange 54 via edges 22 of the hook-shaped projections, which point axially in the direction away from the cutting wheel 12 direction.
  • the preassembled module consisting of the metal plate 62, the wave spring 64 and the driving flange 54, mounted on the drive shaft 14.
  • the bolts 18 are guided during assembly by integrally formed on the circumference of the metal plate 62 recesses 74 and through through holes 76 in the driving flange 54 and engage in the assembled state through the through holes 76 therethrough.
  • the metal plate 62 and the driving flange 54 are secured to each other via the bolts 18 against rotation.
  • the driving flange 54 is pressed onto the drive shaft 14 and then secured with a locking ring, not shown.
  • a press connection In addition to a press connection, however, other, dem.fachmann appear reasonable as connections conceivable, such as a threaded connection, etc.
  • the cutting disk 12 has a sheet metal hub 40 formed by a separate component, which has three uniformly distributed holes 82 in the circumferential direction 36, 38 whose diameter is slightly larger than the diameter of the pin 18. Further, the sheet metal hub 40 has three uniformly in the circumferential direction 36, 38 distributed, extending in the circumferential direction 36, 38 recesses 26, each one narrow region 84 and a wide region 86, the outer contour of which corresponds to a projection surface of the clamping hooks 24 in the direction of the cutting disk 12.
  • the diameter of the center hole of the sheet metal hub 40 is selected so that the cutting disc 12 can be clamped with a conventional clamping system with a clamping flange and a spindle nut on a conventional angle grinder. It ensures a so-called backward compatibility.
  • the clamping hooks 24 form by their shape a first means 32 and a first part of a second means 20, 20 'to avoid reversed mounting of the cutting disk 12.
  • the first means 32 and an edge of the clamping hook 24 would come at a rotational movement required for the assembly with an edge 92 of the recess 26 into abutment, the rotational movement of the cutting disk 12 would be blocked and a Fixing the blade 12 in the axial direction 34 would be prevented.
  • the projection surface of the tensioning hook 24 in the direction of the separating disk 12 is asymmetrical to an axis 28 which perpendicularly intersects an axis of rotation of the separating disk 12 and extends through a center of the projection surface, specifically the projection surface of the tensioning hook 24 has a rectangular area on one side in a corner region a flat 20 ( Figure 3).
  • the projection screen with the flattening 20 forms with the corresponding recess 26 with a corresponding flattening 20 'the coding 20, 20' (FIGS. 2, 3 and 4).
  • the sheet metal hub 40 of the cutting wheel 12 is connected via a rivet connection firmly with an abrasive and pressed and is executed by a pointing in the axial direction 34 molding 30 'cup-shaped.
  • the formation 30 ' forms a first part of a coding 30, 30' (FIGS. 5 and 6).
  • a corresponding second part of the coding 30, 30 ' is formed by a surface 30 of a protective hood 42 of the tool holder, on the surface 30 of which the cutting disk 12 comes to rest in a laterally reversed mounting, before the clamping hooks 24 can be inserted into the recesses 26 (FIG 2).
  • the cutting disk 12 is pushed with its center hole 88 on the centering collar 58 and radially centered. Subsequently, the cutting wheel 12 is rotated, until the clamping hooks 24 engage in the designated wide areas 86 of the recesses 26 of the sheet metal hub 40. Pressing the sheet metal hub 40 against the bearing surface 56 of the driving flange 54 causes the bolts 18 are axially displaced in the through holes 76 and the drive plate 72 against the spring force of the coil spring 16 on the drive shaft 14 in the direction away from the blade 12 66.
  • the holes 82 come in the sheet metal hub 40 via the through holes 76 of the driving flange 54 to lie.
  • the bolts 18 are displaced axially in the direction 34 of the cutting disk 12 by the spring force of the helical spring 16, engage in the holes 82 of the sheet metal hub 40 and fix them in both circumferential directions 36, 38 in a form-fitting manner.
  • an audible click sound is heard by an operator, signaling that the device is ready for operation.
  • the fasteners and the slots in the sheet metal hub can be performed rotated by 180 °, so that the mounting direction reverses, and the sheet metal hub is rotated during assembly in the drive direction.
  • the fasteners twisted by 180 ° carried out, in advance an operating obliquely an oblique surface of a lower end edge of the fastener, so that there is a kind of deflector, which effectively prevents hooking of the end edge, for example, upon contact with a workpiece edge.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einem System mit einer Werkzeugaufnahme nach dem Oberbegriff des Anspruchs 1, solch eine Vorrichtung ist aus der DE 1 577 422 bekannt.The invention is based on a system with a tool holder according to the preamble of claim 1, such a device is known from DE 1 577 422.

Aus der EP 0 904 896 A2 ist ein System mit einer Schleifmaschinenwerkzeugaufnahme für eine handgeführte Winkelschleifmaschine und einer Schleifscheibe bekannt. Die Winkelschleifmaschine besitzt eine Antriebswelle, die werkzeugseitig ein Gewinde aufweist.From EP 0 904 896 A2 a system with a grinding machine tool holder for a hand-held angle grinding machine and a grinding wheel is known. The angle grinder has a drive shaft which has a thread on the tool side.

Aus der DE 1 577 422 ist ein System mit einer Werkzeugaufnahme bekannt, die eine Mitnahmevorrichtung aufweist, über die ein Einsatzwerkzeug mit einer Antriebswelle über ein gegen ein Federelement bewegbar gelagertes Steckelement wirkungsmäßig verbindbar ist. Das Steckelement fixiert das Einsatzwerkzeug in einer Betriebsstellung formschlüssig.From DE 1 577 422 a system with a tool holder is known, which has a driving device, via which an insert tool with a drive shaft via a movable against a spring element mounted plug element is operatively connected. The plug element fixes the insert tool positively in an operating position.

Die Schleifmaschinenwerkzeugaufnahme besitzt einen Mitnehmer und eine Spannmutter. Zur Montage der Schleifscheibe wird der Mitnehmer mit einer Montageöffnung auf einen Bund der Antriebswelle aufgeschoben und über die Spannmutter kraftschlüssig gegen eine Auflagefläche der Antriebswelle verspannt. Der Mitnehmer besitzt einen sich werkzeugseitig in axialer Richtung erstreckenden Bund, der radial an zwei gegenüberliegenden Seiten an seinem Außenumfang Ausnehmungen aufweist, die sich in axialer Richtung bis zu einem Grund des Bunds erstrecken. Ausgehend von den Ausnehmungen erstreckt sich entgegen der Antriebsrichtung der Antriebswelle jeweils eine Nut am Außenumfang des Bunds. Die Nuten sind entgegen der Antriebsrichtung der Antriebswelle verschlossen und verjüngen sich axial ausgehend von den Ausnehmungen entgegen der Antriebsrichtung der Antriebswelle.The grinding machine tool holder has a driver and a clamping nut. To mount the grinding wheel of the driver is pushed with a mounting hole on a collar of the drive shaft and clamped over the clamping nut frictionally against a bearing surface of the drive shaft. The driver has a tool side in the axial direction extending collar radially on two opposite Has sides on its outer circumference recesses which extend in the axial direction to a bottom of the collar. Starting from the recesses extending against the drive direction of the drive shaft in each case a groove on the outer circumference of the collar. The grooves are closed against the drive direction of the drive shaft and taper axially from the recesses against the drive direction of the drive shaft.

Die Schleifscheibe besitzt eine Nabe mit einer Montageöffnung, in der zwei gegenüberliegende, radial nach innen weisende Zungen angeordnet sind. Die Zungen können in axialer Richtung in die Ausnehmungen und anschließend in Umfangsrichtung, entgegen der Antriebsrichtung, in die Nuten eingeführt werden. Die Schleifscheibe ist über die Zungen in den Nuten in axialer Richtung formschlüssig und durch die sich verjüngende Kontur der Nuten kraftschlüssig fixiert. Während des Betriebs nimmt der Kraftschluß infolge von auf die Schleifscheibe wirkenden Reaktionskräften zu, die entgegen der Antriebsrichtung wirken.The grinding wheel has a hub with a mounting opening in which two opposite, radially inwardly pointing tongues are arranged. The tongues can be introduced into the recesses in the axial direction and then into the grooves in the circumferential direction, counter to the drive direction. The grinding wheel is positively connected via the tongues in the grooves in the axial direction and frictionally fixed by the tapered contour of the grooves. During operation, the adhesion increases due to acting on the grinding wheel reaction forces acting counter to the drive direction.

Um ein Ablaufen der Schleifscheibe beim Abbremsen der Antriebswelle vom Mitnehmer zu vermeiden, ist im Bereich einer Ausnehmung am Umfang des Bunds ein Stopper angeordnet, der in einer Öffnung in axialer Richtung beweglich gelagert ist. In einer mit der Schleifscheibe nach unten weisenden Arbeitsstellung wird der Stopper durch die Schwerkraft axial in Richtung Schleifscheibe ausgelenkt, verschließt in Richtung Ausnehmung die Nut und blockiert eine Bewegung der in der Nut befindlichen Zunge in Antriebsrichtung der Antriebswelle.In order to prevent the grinding wheel from running off the driver when the drive shaft is being decelerated, a stopper is arranged in the region of a recess on the circumference of the collar and is movably mounted in an opening in the axial direction. In a working position pointing downwards with the grinding wheel, the stopper is deflected by gravity axially in the direction of the grinding wheel, closes the groove in the direction of the recess and blocks movement of the tongue located in the groove in the drive direction of the drive shaft.

Vorteile der ErfindungAdvantages of the invention

Die Erfindung geht aus von einem System mit einer Werkzeugaufnahme, die eine Mitnahmevorrichtung aufweist, über die ein Einsatzwerkzeug mit einer Antriebswelle wirkungsmäßig verbindbar ist, und mit einem Einsatzwerkzeug.The invention relates to a system with a tool holder, which has a driving device, via which an insert tool with a drive shaft is operatively connected, and with an insertion tool.

Es wird vorgeschlagen, daß das Einsatzwerkzeug über zumindest ein gegen ein Federelement bewegbar gelagertes Rastelement mit der Mitnahmevorrichtung wirkungsmäßig verbindbar ist, das in einer Betriebsstellung des Einsatzwerkzeugs einrastet und das Einsatzwerkzeug formschlüssig fixiert, wobei zumindest an der Werkzeugaufnahme wenigstens ein Teil eines Mittels zur Vermeidung einer-seitenverkehrten Montage des Einsatzwerkzeugs angebracht ist. Ein Beschädigen bzw. ein Zerstören von Einsatzwerkzeugen, insbesondere von drehrichtungsgebundenen Diamant-Trennscheiben, kann vorteilhaft vermieden und ein Beschädigen der Handwerkzeugmaschine im Arbeitsbetrieb durch die seitenverkehrte Montage kann verhindert werden. Insbesondere bei Handwerkzeugmaschinen, deren Einsatzwerkzeug mit einem Schnellspannsystem besonders schnell und einfach montiert bzw. gewechselt werden kann, ist es besonders wichtig, daß eine durch eine seitenverkehrte Fehlmontage bedingte unsichere Befestigung des Einsatzwerkzeugs vermieden wird.It is proposed that the insertion tool via at least one movable against a spring element locking element with the driving device is connected, which engages in an operating position of the insert tool and the insert tool fixed positively, at least at the tool holder at least a part of a means for avoiding a reversed mounting of the insert tool is mounted. Damaging or destroying insert tools, in particular rotationally bound diamond cutting discs, can advantageously be avoided and damage to the hand tool machine during normal operation by the reversed assembly can be prevented. In particular, in portable power tools whose insert tool with a quick-release system can be particularly quickly and easily mounted or replaced, it is particularly important that an insecure attachment of the insert tool caused by a wrong-side incorrect assembly is avoided.

Vorteilhaft besitzt die Mitnahmevorrichtung wenigstens ein Funktionselement, das zumindest einen Teil des Mittels bildet. Vorhandene Bauteile können vorteilhaft genutzt und zusätzliche Bauteile zur Realisierung des Mittels können vermieden werden.Advantageously, the entrainment device has at least one functional element which forms at least part of the agent. Existing components can be used advantageously and additional components for the realization of the agent can be avoided.

Das Mittel kann verschiedenartig ausgebildet sein, beispielsweise kann das Mittel von einem speziell geformten Spannhaken gebildet sein, der bei einer seitenverkehrten Montage des Einsatzwerkzeugs eine zur vollständigen Montage erforderliche Drehbewegung blockiert.The means may be formed in various ways, for example, the means may be formed by a specially shaped clamping hook, which blocks a rotational movement required for complete assembly in a reversed mounting of the insert tool.

Besonders vorteilhaft ist zur Vermeidung einer seitenverkehrten Montage an der Werkzeugaufnahme und am Einsatzwerkzeug mindestens eine korrespondierende Kodierung angebracht, die das Mittel zur Vermeidung der seitenverkehrten Montage des Einsatzwerkzeugs bildet. Es kann vorteilhaft bereits ein seitenverkehrtes Aufstecken des Einsatzwerkzeugs auf die Werkzeugaufnahme vermieden werden, und es ist ein kostengünstiger und einfacher Schutz vor einer Fehlmontage erreichbar, bei dem vorhandene Bauteile genutzt und zusätzliche Bauteile vermieden werden können. Die Kodierung kann von verschiedenen, dem Fachmann als sinnvoll erscheinenden Bauteilen gebildet sein. Besonders vorteilhaft ist die Kodierung jedoch zumindest zum Teil von einem Funktionselement gebildet, wie beispielsweise von einem Spannhaken oder einem Rastelement, welches das Einsatzwerkzeug in Umfangsrichtung sichert.It is particularly advantageous to avoid reversed mounting on the tool holder and the insert tool at least a corresponding coding attached, which forms the means for avoiding the reversed mounting of the insert tool. It can be advantageous already a laterally reversed attachment of the insert tool can be avoided on the tool holder, and it is a cost-effective and easy protection against incorrect assembly achievable, can be used in the existing components and additional components can be avoided. The coding can be formed by various components that appear appropriate to the person skilled in the art. However, the coding is particularly advantageously formed at least in part by a functional element, such as, for example, a tensioning hook or a detent element which secures the insertion tool in the circumferential direction.

Um eine kostengünstige und einfache Kodierung zu erreichen, besitzt das Funktionselement in Richtung Einsatzwerkzeug eine Projektionsfläche, die asymmetrisch zu einer Achse ausgeführt ist, die senkrecht eine Rotationsachse des Einsatzwerkzeugs schneidet, wobei das Einsatzwerkzeug eine der Projektionsfläche zumindest teilweise entsprechende, mit dem Funktionselement korrespondierende Ausnehmung aufweist.In order to achieve a cost-effective and simple coding, the functional element in the direction of insertion tool has a projection surface which is asymmetrical to an axis perpendicularly intersecting a rotation axis of the insert tool, wherein the insert tool has one of the projection at least partially corresponding, corresponding to the functional element recess ,

In einer weiteren Ausgestaltung der Erfindung wird vorgeschlagen, daß das Einsatzwerkzeug eine von einem separaten Bauteil gebildete, scheibenförmige Nabe aufweist. Es kann eine Nabe erreicht werden, die kostengünstig und einfach herstellbar ist. Die Nabe kann aus einem speziellen Material, insbesondere aus einem Blech gefertigt werden, so daß besonders einfach und kostengünstig, z.B. mit einem Stanzverfahren, eine mit dem Funktionselement korrespondierende Ausnehmung exakt eingebracht werden kann. Die Nabe kann jedoch anstatt aus Blech auch aus anderen Materialien gebildet sein, die der Fachmann als sinnvoll erachtet, wie z.B. aus einem Kunststoff, einer Glasfaser, einem Verbundstoff usw. und/oder kann auch einstückig an das Einsatzwerkzeug angeformt sein.In a further embodiment of the invention, it is proposed that the insert tool has a disc-shaped hub formed by a separate component. It can be achieved a hub that is inexpensive and easy to produce. The hub can be made of a special material, in particular of a metal sheet, so that particularly simple and inexpensive, e.g. with a punching method, a corresponding with the functional element recess can be accurately introduced. However, instead of being made of sheet metal, the hub may be formed of other materials which the person skilled in the art would consider useful, such as e.g. made of a plastic, a glass fiber, a composite, etc. and / or may also be integrally formed on the insert tool.

Besonders vorteilhaft weist das Einsatzwerkzeug eine Nabe mit einer in axialer Richtung weisenden Ausformung auf. Es kann einfach und kostengünstig ein Schutz der Funktionselemente erreicht und zudem kann vorteilhaft durch die Ausformung eine' seitenverkehrte Montage des Einsatzwerkzeugs vermieden werden. Ist die Nabe von einem Blechteil gebildet, kann die Ausformung kostengünstig in einem Tiefziehprozeß angeformt werden.Particularly advantageously, the insert tool has a hub with a shaping pointing in the axial direction. It can be easily and inexpensively achieved a protection of the functional elements and also can be advantageously avoided by the formation of a 'reversed mounting of the insert tool. If the hub formed by a sheet metal part, the formation can be inexpensively formed in a deep-drawing process.

Die Ausformung kann verschiedene, dem Fachmann als sinnvoll erscheinende Formen aufweisen. Ist die Nabe napfförmig ausgebildet bzw. erstreckt sich die Ausformung im mittleren Bereich der Nabe über einen größeren Bereich, kann die Ausformung mit einem einfachen Werkzeug angeformt und zudem kann eine hohe Stabilität der Nabe erreicht werden. Ferner kann insbesondere bei Handwerkzeugmaschinen, die eine Schutzhaube aufweisen, ein Formschluß des Funktionselements mit einer Ausnehmung der Nabe des Einsatzwerkzeugs bei einer seitenverkehrten Montage verhindert werden, und zwar indem infolge der Ausformung bei einer seitenverkehrten Montage das Einsatzwerkzeug auf der Schutzhaube aufliegt, bevor das Funktionselement in der Ausnehmung zum Eingriff kommt.The shaping can have various forms that appear appropriate to the person skilled in the art. If the hub is cup-shaped or extends in the middle region of the hub over a larger area, the molding can be formed with a simple tool and also a high stability of the hub can be achieved. Furthermore, in particular in handheld power tools that have a protective hood, a positive connection of the functional element with a Recess of the hub of the insert tool can be prevented in a side-inverted mounting, namely by the insert tool rests on the protective cover due to the formation in a reversed mounting before the functional element comes into engagement in the recess.

Die erfindungsgemäße Lösung kann bei verschiedenen, dem Fachmann als hierfür geeignet erscheinenden Handwerkzeugmaschinen angewendet werden, insbesondere bei Winkelschleifmaschinen.The solution according to the invention can be applied to various hand tool machines that appear suitable for the person skilled in the art, in particular for angle grinders.

Zeichnungdrawing

Weitere Vorteile ergeben sich aus der folgenden Zeichnungsbeschreibung. In den Zeichnungen ist ein Ausführungsbeispiel der Erfindung dargestellt. Die Zeichnungen, die Beschreibung und die Ansprüche enthalten zahlreiche Merkmale in Kombination. Der Fachmann wird die Merkmale zweckmäßigerweise auch einzeln betrachten und zu sinnvollen weiteren Kombinationen zusammenfassen.Further advantages emerge from the following description of the drawing. In the drawings, an embodiment of the invention is shown. The drawings, the description and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into meaningful further combinations.

Es zeigen:

Fig. 1
eine Winkelschleifmaschine von oben,
Fig. 2
eine Explosionszeichnung einer Werkzeugaufnahme,
Fig. 3
eine vergrößerte Darstellung eines Spannhakens aus Fig. 2 von oben,
Fig. 4
eine Seitenansicht einer Blechplatte aus Fig. 2,
Fig. 5
einen Mitnahmeflansch aus Fig. 2 von unten,
Fig. 6
eine Blechnabe einer Trennscheibe und
Fig. 7
einen Schnitt entlang der Linie VI-VI in Fig. 6.
Show it:
Fig. 1
an angle grinder from above,
Fig. 2
an exploded view of a tool holder,
Fig. 3
an enlarged view of a clamping hook of FIG. 2 from above,
Fig. 4
a side view of a sheet metal plate of Fig. 2,
Fig. 5
a driving flange of FIG. 2 from below,
Fig. 6
a sheet metal hub of a cutting disc and
Fig. 7
a section along the line VI-VI in Fig. 6.

Beschreibung des AusführungsbeispielsDescription of the embodiment

Fig. 1 zeigt eine Winkelschleifmaschine 44 von oben mit einem in einem Gehäuse 46 gelagerten, nicht näher dargestellten Elektromotor. Die Winkelschleifmaschine 44 ist über einen ersten, im Gehäuse 46 auf der einer Trennscheibe 12 abgewandten Seite integrierten, sich in Längsrichtung erstreckenden Handgriff 48 und über einen zweiten an einem Getriebegehäuse 50 im Bereich der Trennscheibe 12 befestigten, sich quer zur Längsrichtung erstreckenden Handgriff 52 führbar. Mit dem Elektromotor ist über ein nicht näher dargestelltes Getriebe eine Antriebswelle 14 antreibbar, an deren zur Trennscheibe 12 weisenden Ende eine Werkzeugaufnahme mit einer Mitnahmevorrichtung 10 angeordnet ist (Fig. 2). Die Werkzeugaufnahme und die Trennscheibe 12 bilden ein System.Fig. 1 shows an angle grinder 44 from above with a mounted in a housing 46, not shown electric motor. The angle grinding machine 44 can be guided via a first, in the housing 46 on the side facing away from a blade 12, extending in the longitudinal direction handle 48 and a second attached to a gear housing 50 in the region of the cutting disc 12, transversely to the longitudinal direction extending handle 52 feasible. With the electric motor, a drive shaft 14 can be driven via a transmission, not shown in detail, at whose end facing the blade 12 a tool holder with a driving device 10 is arranged (Fig. 2). The tool holder and the cutting disc 12 form a system.

Die Mitnahmevorrichtung 10 besitzt einen Mitnahmeflansch 54, der eine Auflagefläche 56 für die Trennscheibe 12 bildet (Fig. 2 und 4). An den Mitnahmeflansch 54 ist auf der der Trennscheibe 12 zugewandten Seite ein Bund 58 angeformt, über den die Trennscheibe 12 mit ihrer Zentrierbohrung 88 im montierten Zustand radial zentriert ist. Radiale Kräfte können vorteilhaft vom Mitnahmeflansch 54 aufgenommen werden, ohne eine Entriegelungstaste 60 zu belasten.The entrainment device 10 has a driving flange 54, which forms a bearing surface 56 for the cutting disk 12 (FIGS. 2 and 4). On the driving flange 54, a collar 58 is integrally formed on the side facing the cutting disk 12, via which the cutting disk 12 is radially centered with its centering bore 88 in the mounted state. Radial forces can advantageously be absorbed by the driving flange 54 without loading an unlocking button 60.

Auf einer der Trennscheibe 12 abgewandten Seite des Mitnahmeflansches 54 ist eine Blechplatte 62 mit drei in Umfangsrichtung 36, 38 gleichmäßig verteilten, einstückig angeformten, sich in axialer Richtung 34 erstreckenden Spannhaken 24 zur axialen Fixierung der Trennscheibe 12 angeordnet (Fig. 2 und 4). Die Spannhaken 24 sind in einem Biegevorgang an die Blechplatte 62 angeformt.On a side facing away from the cutting disc 12 of the driving flange 54 is a metal plate 62 with three circumferentially 36, 38 evenly distributed, integrally formed, extending in the axial direction 34 clamping hooks 24 for axial fixation of the cutting disc 12 is arranged (FIGS. 2 and 4). The clamping hooks 24 are formed in a bending operation on the metal plate 62.

Bei der Montage der Mitnahmevorrichtung 10 werden der Mitnahmeflansch 54, eine Wellfeder 64 und die Blechplatte 62 vormontiert. Dabei wird die Wellfeder 64 auf einen in die von der Trennscheibe 12 abgewandte Richtung weisenden Bund 94 des Mitnahmeflansches 54 aufgeschoben. Anschließend werden die Spannhaken 24 der Blechplatte 62, die an ihrem freien Ende einen hakenförmigen Fortsatz mit einer in Umfangsrichtung weisenden Schrägfläche 78 aufweisen (Fig. 2, 3 und 4), in axialer Richtung 34 durch Ausnehmungen 70 des Mitnahmeflansches 54 geführt, und zwar jeweils durch verbreiterte Bereiche 90 der Ausnehmungen 70 (Fig. 2 und 4). Durch Zusammendrücken und Verdrehen der Blechplatte 62 und des Mitnahmeflansches 54 gegeneinander wird die Wellfeder 64 vorgespannt, und die Blechplatte 62 und der Mitnahmeflansch 54 werden in axialer Richtung 34, 66 formschlüssig verbunden, und zwar indem die hakenförmigen Fortsätze in schmale Bereiche 68 der Ausnehmungen 70 verdreht werden (Fig. 2, 3 und 4). Die Blechplatte 62 ist anschließend, belastet durch die Wellfeder 64, an der Auflagefläche 56 des Mitnahmeflansches 54 über Kanten 22 der hakenförmigen Fortsätze abgestützt, die axial in die von der Trennscheibe 12 abgewandte Richtung weisen.During assembly of the driving device 10, the driving flange 54, a corrugated spring 64 and the sheet metal plate 62 are pre-assembled. In this case, the corrugated spring 64 is pushed onto a pointing in the direction away from the blade 12 direction collar 94 of the driving flange 54. Subsequently, the clamping hooks 24 of the metal plate 62, which at its free end a hook-shaped extension with a circumferentially facing inclined surface 78 (FIGS. 2, 3 and 4), guided in the axial direction 34 by recesses 70 of the driving flange 54, respectively by widened regions 90 of the recesses 70 (FIGS. 2 and 4). By compressing and rotating the metal plate 62 and the driving flange 54 against each other, the wave spring 64 is biased, and the metal plate 62 and the driving flange 54 are positively connected in the axial direction 34, 66, by the hook-shaped projections in narrow portions 68 of the recesses 70 is rotated (Figures 2, 3 and 4). The metal plate 62 is then, loaded by the wave spring 64, supported on the support surface 56 of the driving flange 54 via edges 22 of the hook-shaped projections, which point axially in the direction away from the cutting wheel 12 direction.

Nachdem die Blechplatte 62 mit den angeformten Spannhaken 24, die Wellfeder 64 und der Mitnahmeflansch 54 vormontiert sind, werden eine Schraubenfeder 16 und eine Mitnehmerscheibe 72 mit drei gleichmäßig über den Umfang verteilten, sich in axialer Richtung 34 erstreckenden Bolzen 18 auf eine Antriebswelle 14 aufgesteckt (Fig. 2).After the sheet metal plate 62 with the molded clamping hooks 24, the wave spring 64 and the driving flange 54 are assembled, a coil spring 16 and a drive plate 72 with three evenly distributed over the circumference, in the axial direction 34 extending bolt 18 mounted on a drive shaft 14 ( Fig. 2).

Anschließend wird die vormontierte Baugruppe, bestehend aus der Blechplatte 62, der Wellfeder 64 und dem Mitnahmeflansch 54, auf die Antriebswelle 14 montiert. Die Bolzen 18 werden bei der Montage durch am Umfang der Blechplatte 62 angeformte Ausnehmungen 74 und durch Durchgangsbohrungen 76 im Mitnahmeflansch 54 geführt und greifen im montierten Zustand durch die Durchgangsbohrungen 76 hindurch. Die Blechplatte 62 und der Mitnahmeflansch 54 sind über die Bolzen 18 gegen Verdrehen zueinander gesichert.Subsequently, the preassembled module, consisting of the metal plate 62, the wave spring 64 and the driving flange 54, mounted on the drive shaft 14. The bolts 18 are guided during assembly by integrally formed on the circumference of the metal plate 62 recesses 74 and through through holes 76 in the driving flange 54 and engage in the assembled state through the through holes 76 therethrough. The metal plate 62 and the driving flange 54 are secured to each other via the bolts 18 against rotation.

Der Mitnahmeflansch 54 wird auf die Antriebswelle 14 aufgepreßt und anschließend mit einem nicht näher dargestellten Sicherungsring gesichert. Neben einer Preßverbindung sind jedoch auch andere, dem.Fachmann als sinnvoll erscheinende Verbindungen denkbar, wie beispielsweise eine Gewindeverbindung usw.The driving flange 54 is pressed onto the drive shaft 14 and then secured with a locking ring, not shown. In addition to a press connection, however, other, dem.fachmann appear reasonable as connections conceivable, such as a threaded connection, etc.

Die Trennscheibe 12 besitzt eine von einem separaten Bauteil gebildete Blechnabe 40, die in Umfangsrichtung 36, 38 hintereinander drei gleichmäßig verteilte Bohrungen 82 aufweist, deren Durchmesser geringfügig größer ist als der Durchmesser der Bolzen 18. Ferner besitzt die Blechnabe 40 drei gleichmäßig in Umfangsrichtung 36, 38 verteilte, sich in Umfangsrichtung 36, 38 erstreckende Ausnehmungen 26, die jeweils einen schmalen Bereich 84 und einen breiten Bereich 86 aufweisen, deren Außenkontur einer Projektionsfläche der Spannhaken 24 in Richtung der Trennscheibe 12 entspricht.The cutting disk 12 has a sheet metal hub 40 formed by a separate component, which has three uniformly distributed holes 82 in the circumferential direction 36, 38 whose diameter is slightly larger than the diameter of the pin 18. Further, the sheet metal hub 40 has three uniformly in the circumferential direction 36, 38 distributed, extending in the circumferential direction 36, 38 recesses 26, each one narrow region 84 and a wide region 86, the outer contour of which corresponds to a projection surface of the clamping hooks 24 in the direction of the cutting disk 12.

Der Durchmesser der Zentrierbohrung der Blechnabe 40 ist so gewählt, daß die Trennscheibe 12 auch mit einem herkömmlichen Spannsystem mit einem Spannflansch und einer Spindelmutter auf eine herkömmliche Winkelschleifmaschine aufgespannt werden kann. Es wird eine sogenannte Abwärtskompatibilität sichergestellt.The diameter of the center hole of the sheet metal hub 40 is selected so that the cutting disc 12 can be clamped with a conventional clamping system with a clamping flange and a spindle nut on a conventional angle grinder. It ensures a so-called backward compatibility.

Die Spannhaken 24 bilden durch ihre Form ein erstes Mittel 32 und einen ersten Teil eines zweiten Mittels 20, 20' zur Vermeidung einer seitenverkehrten Montage der Trennscheibe 12. Könnte bei einer seitenverkehrten Montage der Trennscheibe 12 der Spannhaken 24 in den breiten Bereich 86 der korrespondierenden Ausnehmung 26 der Blechnabe 40 der Trennscheibe 12 eingeführt werden, so würde das erste Mittel 32 bzw. eine Kante des Spannhakens 24 bei einer für die Montage erforderlichen Drehbewegung mit einer Kante 92 der Ausnehmung 26 in Anlage kommen, die Drehbewegung der Trennscheibe 12 würde blockiert und ein Fixieren der Trennscheibe 12 in axialer Richtung 34 würde verhindert werden.The clamping hooks 24 form by their shape a first means 32 and a first part of a second means 20, 20 'to avoid reversed mounting of the cutting disk 12. Could at a laterally reversed mounting of the cutting disk 12 of the clamping hooks 24 in the wide region 86 of the corresponding recess 26 of the sheet metal hub 40 of the cutting wheel 12 are introduced, the first means 32 and an edge of the clamping hook 24 would come at a rotational movement required for the assembly with an edge 92 of the recess 26 into abutment, the rotational movement of the cutting disk 12 would be blocked and a Fixing the blade 12 in the axial direction 34 would be prevented.

Die Projektionsfläche des Spannhakens 24 in Richtung Trennscheibe 12 ist asymmetrisch zu einer Achse 28 ausgeführt, die senkrecht eine Rotationsachse der Trennscheibe 12 schneidet und durch einen Mittelpunkt der Projektionsfläche verläuft, und zwar besitzt die Projektionsfläche des Spannhakens 24 gegenüber einer Rechteckfläche an einer Seite in einem Eckbereich eine Abflachung 20 (Fig. 3). Die Projektionsfläche mit der Abflachung 20 bildet mit der korrespondierenden Ausnehmung 26 mit einer entsprechenden Abflachung 20' die Kodierung 20, 20' (Fig. 2, 3 und 4). Durch die Kodierung 20, 20' wird bei einer seitenverkehrten Montage bereits ein Aufstecken der Trennscheibe 12 auf die Mitnahmevorrichtung 10 verhindert.The projection surface of the tensioning hook 24 in the direction of the separating disk 12 is asymmetrical to an axis 28 which perpendicularly intersects an axis of rotation of the separating disk 12 and extends through a center of the projection surface, specifically the projection surface of the tensioning hook 24 has a rectangular area on one side in a corner region a flat 20 (Figure 3). The projection screen with the flattening 20 forms with the corresponding recess 26 with a corresponding flattening 20 'the coding 20, 20' (FIGS. 2, 3 and 4). By the coding 20, 20 ', a plugging of the cutting disk 12 on the driving device 10 is already prevented in the event of a laterally reversed mounting.

Die Blechnabe 40 der Trennscheibe 12 ist über eine Nietverbindung fest mit einem Schleifmittel verbunden und verpreßt und ist durch eine in axialer Richtung 34 weisende Ausformung 30' napfförmig ausgeführt. Die Ausformung 30' bildet einen ersten Teil einer Kodierung 30, 30' (Fig. 5 und 6). Ein korrespondierender zweiter Teil der Kodierung 30, 30' wird von einer Oberfläche 30 einer Schutzhaube 42 der Werkzeugaufnahme gebildet, auf deren Oberfläche 30 die Trennscheibe 12 bei einer seitenverkehrten Montage zum Liegen kommt, bevor die Spannhaken 24 in die Ausnehmungen 26 eingeführt werden können (Fig. 2).The sheet metal hub 40 of the cutting wheel 12 is connected via a rivet connection firmly with an abrasive and pressed and is executed by a pointing in the axial direction 34 molding 30 'cup-shaped. The formation 30 'forms a first part of a coding 30, 30' (FIGS. 5 and 6). A corresponding second part of the coding 30, 30 'is formed by a surface 30 of a protective hood 42 of the tool holder, on the surface 30 of which the cutting disk 12 comes to rest in a laterally reversed mounting, before the clamping hooks 24 can be inserted into the recesses 26 (FIG 2).

Bei einer seitenkorrekten Montage der Trennscheibe 12 wird die Trennscheibe 12 mit ihrer Zentrierbohrung 88 auf den Zentrierbund 58 aufgeschoben und radial zentriert. Anschließend wird die Trennscheibe 12 verdreht, und zwar bis die Spannhaken 24 in die dafür vorgesehenen breiten Bereiche 86 der Ausnehmungen 26 der Blechnabe 40 greifen. Ein Andrücken der Blechnabe 40 an die Auflagefläche 56 des Mitnahmeflansches 54 bewirkt, daß die Bolzen 18 in den Durchgangsbohrungen 76 und die Mitnehmerscheibe 72 gegen eine Federkraft der Schraubenfeder 16 auf der Antriebswelle 14 axial in die von der Trennscheibe 12 abgewandte Richtung 66 verschoben werden.In a correct side mounting of the cutting wheel 12, the cutting disk 12 is pushed with its center hole 88 on the centering collar 58 and radially centered. Subsequently, the cutting wheel 12 is rotated, until the clamping hooks 24 engage in the designated wide areas 86 of the recesses 26 of the sheet metal hub 40. Pressing the sheet metal hub 40 against the bearing surface 56 of the driving flange 54 causes the bolts 18 are axially displaced in the through holes 76 and the drive plate 72 against the spring force of the coil spring 16 on the drive shaft 14 in the direction away from the blade 12 66.

Sind die hakenförmigen Fortsätze der Spannhaken 24 durch die breiten Bereiche 86 der Ausnehmungen 26 der Blechnabe 40 geführt (Fig. 2), bewirkt ein Verdrehen der Blechnabe 40 entgegen der Antriebsrichtung 36, daß die hakenförmigen Fortsätze in die bogenförmigen, schmalen Bereiche 84 der Ausnehmungen 26 der Blechnabe 40 verschoben werden. Dabei wird die Blechplatte 62 mit den Spannhaken 24 durch Schrägflächen 80 axial gegen den Druck der Wellfeder 64 in Richtung 34 verschoben, bis die Kanten 22 der hakenförmigen Fortsätze in den bogenförmigen, schmalen Bereichen 84 seitlich neben den Ausnehmungen 26 der Blechnabe 40 zur Anlage kommen. Im montierten Zustand preßt die Wellfeder. 64 über die Kanten 22 der hakenförmigen Fortsätze der Spannhäken 24 die Trennscheibe 12 an die Auflagefläche 56.If the hook-shaped extensions of the clamping hooks 24 are guided through the wide regions 86 of the recesses 26 of the sheet metal hub 40 (FIG. 2), a rotation of the sheet metal hub 40 counter to the drive direction 36 causes the hook-shaped extensions to enter the arcuate, narrow regions 84 of the recesses 26 the sheet metal hub 40 are moved. In this case, the metal plate 62 is moved with the clamping hooks 24 by inclined surfaces 80 axially against the pressure of the wave spring 64 in the direction 34 until the edges 22 of the hook-shaped projections in the arcuate, narrow regions 84 laterally adjacent to the recesses 26 of the sheet metal hub 40 come to rest. When mounted, the corrugated spring presses. 64 on the edges 22 of the hook-shaped extensions of the clamping hooks 24, the cutting disc 12 to the support surface 56th

In einer Endlage bzw. in einer erreichten Betriebsstellung der Trennscheibe 12 kommen die Bohrungen 82 in der Blechnabe 40 über den Durchgangsbohrungen 76 des Mitnahmeflansches 54 zum Liegen. Die Bolzen 18 werden durch die Federkraft der Schraubenfeder 16 axial in Richtung 34 der Trennscheibe 12 verschoben, rasten in den Bohrungen 82 der Blechnabe 40 ein und fixieren diese in beide Umfangsrichtungen 36, 38 formschlüssig. Beim Einrasten entsteht ein für einen Bediener hörbares Einrastgeräusch, das diesem eine Betriebsbereitschaft signalisiert.In an end position or in an reached operating position of the cutting disk 12, the holes 82 come in the sheet metal hub 40 via the through holes 76 of the driving flange 54 to lie. The bolts 18 are displaced axially in the direction 34 of the cutting disk 12 by the spring force of the helical spring 16, engage in the holes 82 of the sheet metal hub 40 and fix them in both circumferential directions 36, 38 in a form-fitting manner. When snapping into place, an audible click sound is heard by an operator, signaling that the device is ready for operation.

Alternativ, jedoch nicht dargestellt, können die Befestigungselemente und die Langlöcher in der Blechnabe um 180° verdreht ausgeführt sein, so daß sich die Montagerichtung umkehrt, und die Blechnabe bei der Montage in Antriebsrichtung verdreht wird. Sind die Befestigungselemente um 180° verdreht ausgeführt, eilt im Betrieb eine Schrägfläche einer unteren Stirnkante des Befestigungselements voraus, so daß sich eine Art Abweiser ergibt, der ein Einhaken der Stirnkante, z.B. bei Kontakt mit einer Werkstückkante wirksam verhindert.Alternatively, but not shown, the fasteners and the slots in the sheet metal hub can be performed rotated by 180 °, so that the mounting direction reverses, and the sheet metal hub is rotated during assembly in the drive direction. Are the fasteners twisted by 180 ° carried out, in advance an operating obliquely an oblique surface of a lower end edge of the fastener, so that there is a kind of deflector, which effectively prevents hooking of the end edge, for example, upon contact with a workpiece edge.

Bezugszeichenreference numeral

1010
Mitnahmevorrichtungdriving device
1212
Einsatzwerkzeugapplication tool
1414
Antriebswelledrive shaft
1616
Federelementspring element
1818
Rastelementlocking element
2020
Mittelmedium
2222
Kanteedge
2424
Funktionselementfunctional element
2626
Ausnehmungrecess
2828
Achseaxis
3030
Kodierungcoding
3232
Mittelmedium
3434
Axiale RichtungAxial direction
3636
Umfangsrichtungcircumferentially
3838
Umfangsrichtungcircumferentially
4040
Nabehub
4242
Schutzhaubeguard
4444
Winkelschleifmaschineangle grinder
4646
Gehäusecasing
4848
Handgriffhandle
5050
Getriebegehäusegearbox
5252
Handgriffhandle
5454
Mitnahmeflanschdriving flange
5656
Auflageflächebearing surface
5858
BundFederation
6060
Entriegelungstasterelease
6262
Blechplattesheet metal plate
6464
WellfederWell spring
6666
Richtungdirection
6868
BereichArea
7070
Ausnehmungrecess
7272
Mitnehmerscheibedriver disc
7474
Ausnehmungrecess
7676
DurchgangsbohrungThrough Hole
7878
Schrägflächesloping surface
8080
Schrägflächesloping surface
8282
Bohrungdrilling
8484
BereichArea
8686
BereichArea
8888
Zentrierbohrungcentering
9090
BereichArea
9292
Kanteedge
9494
BundFederation

Claims (8)

  1. System having a tool-holding fixture which has a driving device (10), via which an application tool (12) can be operatively connected to a drive shaft (14), and having an application tool (12), it being possible for the application tool (12) to be operatively connected to the driving device (10) via at least one latching element (18) which is mounted so as to be movable against a spring element (16) and which latches in place in an operating position of the application tool (12) and fixes the application tool (12) in a positive-locking manner, characterized in that at least part of a means (20, 20', 30, 30', 32) for avoiding laterally transposed mounting of the application tool (12) is provided at least on the tool-holding fixture.
  2. System according to Claim 1, characterized in that the driving device (10) has at least one functional element (24) which forms at least part of the means (20, 20', 32).
  3. System according to Claim 1 or 2, characterized in that at least one corresponding code (20, 20', 30, 30') for avoiding laterally transposed mounting of the application tool (12) is provided on the tool-holding fixture and on the application tool (12).
  4. System according to Claims 2 and 3, characterized in that the functional element (24) has a projected area in the direction of the application tool (12), this projected area being made asymmetrically to an axis (28) which intersects a rotation axis of the application tool (12) at right angles and passes through a centre of the projected area, the application tool (12) having an aperture (26) at least partly corresponding to the projected area and corresponding with the functional element (24).
  5. System according to Claim 3 or 4, characterized in that the application tool (12) has a disc-shaped hub (40) formed by a separate component.
  6. System according to one of Claims 3 to 5, characterized in that the application tool (12) has a hub (40) with a shaped portion (30') pointing in the axial direction (34).
  7. System according to Claim 6, characterized in that the shaped portion (30') forms part of the code (30, 30').
  8. System according to Claim 6 or 7, characterized in that the hub (40) is of bowl-shaped design.
EP02750812A 2001-07-26 2002-07-02 System with a tool holding fixture Expired - Lifetime EP1414620B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10136459 2001-07-26
DE10136459A DE10136459A1 (en) 2001-07-26 2001-07-26 System with implement holder, especially grinding disc has detent movably mounted against spring force, with hub ad axial protuberance
PCT/DE2002/002400 WO2003011527A1 (en) 2001-07-26 2002-07-02 System with a tool holding fixture

Publications (2)

Publication Number Publication Date
EP1414620A1 EP1414620A1 (en) 2004-05-06
EP1414620B1 true EP1414620B1 (en) 2006-05-10

Family

ID=7693192

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02750812A Expired - Lifetime EP1414620B1 (en) 2001-07-26 2002-07-02 System with a tool holding fixture

Country Status (8)

Country Link
US (1) US7077735B2 (en)
EP (1) EP1414620B1 (en)
JP (1) JP2004521770A (en)
KR (1) KR20040038986A (en)
CN (1) CN1258435C (en)
CZ (1) CZ304787B6 (en)
DE (3) DE10136459A1 (en)
WO (1) WO2003011527A1 (en)

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EP1414620A1 (en) 2004-05-06
KR20040038986A (en) 2004-05-08
WO2003011527A1 (en) 2003-02-13
DE50206750D1 (en) 2006-06-14
CN1464818A (en) 2003-12-31
US20040012160A1 (en) 2004-01-22
JP2004521770A (en) 2004-07-22
DE10136459A1 (en) 2003-02-13
CN1258435C (en) 2006-06-07
CZ2003851A3 (en) 2004-01-14
US7077735B2 (en) 2006-07-18
CZ304787B6 (en) 2014-10-22
DE10293322D2 (en) 2004-11-11

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